td.ul{
	width:18px;
	height:18px;
	background:url(../Images/tip/ul.png);
}
td.ur{
	width:18px;
	height:18px;
	background:url(../Images/tip/ur.png);
}
td.bl{
	width:18px;
	height:18px;
	background:url(../Images/tip/bl.png);
}
td.br{
	width:18px;
	height:18px;
	background:url(../Images/tip/br.png);
}
td.u{
	height:18px;
	background:url(../Images/tip/u.jpg);
}
td.r{
	width:18px;
	background:url(../Images/tip/r.jpg);
}
td.b{
	height:18px;
	background:url(../Images/tip/b.jpg);
}
td.l{
	width:18px;
	background:url(../Images/tip/l.jpg);
}
td.c{
	background:#e8e8e8;
	color:#666;
}